Lab Quiz 7: Urine Analysis Terms and Definitions

Ketonuria

• Definition: Presence of ketones in urine.
• Significance: Indicates metabolic states such as fat metabolism, diabetes, or starvation.

Glycosuria

• Definition: Presence of glucose in urine.
• Significance: Suggests the presence of diabetes mellitus, a condition characterized by high blood sugar levels.

Proteinuria

• Definition: Presence of protein in urine.
• Significance: Often indicates glomerular damage, which can result from various kidney diseases.

Specific Gravity

• Definition: Measure of urine concentration.
• Normal Range: Between 1.0015 and 1.035.
• Importance: Helps assess hydration status and kidney function.

Mohr Method

• Definition: A titration method using silver nitrate to detect sodium chloride (NaCl) concentration in urine.
• Application: Useful in testing for electrolyte imbalances and other urinary conditions.

Occult Blood

• Definition: Hidden blood present in urine.
• Implications: Can indicate various health issues such as urinary tract infections (UTI), nephritis, or trauma to the urinary system.

Urinometer

• Definition: An instrument used to measure the specific gravity of urine.
• Usage: Essential tool in clinical labs for evaluating urine concentration.

Labstix Test

• Definition: A test strip that checks for the presence of pH, protein, glucose, ketones, and occult blood in urine.
• Purpose: Quickly assesses multiple constituents of urine for diagnostic purposes.

Glomerulus

• Definition: A capillary tuft that acts as a filtration unit in the nephron.
• Function: Plays a critical role in filtering blood and forming urine.

Nephron

• Definition: The functional unit of the kidney that filters blood and produces urine.
• Components: Each nephron contains a glomerulus, renal tubules, and blood vessels.

Diabetes Mellitus

• Definition: A chronic condition where glucose and ketones may appear in urine due to improper insulin function.
• Consequences: Can lead to long-term damage to various organs if not managed properly.

Urine pH

• Definition: The acidity or alkalinity of urine, which is typically around 6.
• Factors Affecting pH: Diet, dehydration, and presence of UTIs can alter urine pH levels.

Dehydration

• Definition: A condition that results in decreased water content in the body.
• Effects on Urine: Leads to high specific gravity and low urine volume, indicating concentrated urine.

Overhydration

• Definition: A state of excess water accumulation in the body.
• Effects on Urine: Results in low specific gravity and high urine volume, indicating diluted urine.

Silver Nitrate Drop

• Definition: The quantity of silver nitrate used in the Mohr Method, equivalent to 1 g/L of NaCl in urine.
• Relevance: Important for quantifying sodium chloride levels and understanding renal function and electrolyte balance.